Stretch marks showed up on my cousin’s thighs the summer she hit her growth spurt at fourteen. She hadn’t gained a pound. She was just taller by June than she’d been in March, and her skin couldn’t keep up. That mix of confusion and self-consciousness is something almost everyone in Collierville has felt at some point, whether it started with puberty, a pregnancy, a new gym routine, or nothing you can even pinpoint.
If you have ever looked down and wondered why do stretch marks appear when your weight hasn’t budged, you are not imagining things. Somewhere between 50 and 90 percent of people develop them at some point, according to dermatology research, and the reasons go well beyond “you gained weight.” Genetics, hormones, growth spurts, muscle gain, and even certain medications all play a role.
This guide from Embrace Skin & Wellness walks through what is actually happening underneath your skin, the real causes of stretch marks, why some people get them and others don’t, what the different colors mean, and what can genuinely help once they show up.
What Exactly Are Stretch Marks?
Stretch marks, known medically as striae distensae, are a form of scarring, not just discoloration. They form in the dermis, the supportive middle layer of skin that sits below the epidermis and holds the collagen and elastin fibers responsible for keeping skin firm and flexible.
When those fibers tear from rapid stretching, the dermis thins out in narrow bands. Blood vessels or fatty tissue underneath become more visible through that thinned area, which is why stretch marks often look like streaks running in the direction the skin was pulled. They are not a surface stain you can scrub away. They are a change in the structure of the skin itself.
Why Do Stretch Marks Appear in the First Place?
Skin is elastic, but only to a point. When it stretches faster than collagen and elastin can adjust, those fibers snap instead of stretching smoothly. The body heals the area, but the repair tissue does not have the same texture or pigment as the skin around it, which is what creates the visible line.
Speed matters more than the amount of stretch itself. A person who gains weight gradually over a year may never develop stretch marks from weight gain, while someone who goes through a two-month growth spurt or a fast pregnancy weight change often will. The dermis simply does not get enough time to build new supportive tissue before it is asked to expand.
What Are the Most Common Causes of Stretch Marks?
Most people assume weight gain is the only trigger, but it is really one entry on a longer list.
Puberty and growth spurts: Rapid height and body changes during the teen years stretch skin around the thighs, hips, and lower back faster than collagen can keep pace, which is why so many teenagers develop marks with no real weight change at all.
Pregnancy: As the abdomen and breasts expand over a matter of months, combined with hormonal shifts that soften connective tissue, stretch marks during pregnancy become extremely common, especially in the third trimester.
Rapid weight gain: Increased tension on the skin over the stomach, hips, and thighs is a well-known trigger, particularly when the gain happens over weeks rather than years.
Rapid weight loss: This one gets misunderstood. Weight loss itself does not tear skin, but marks that formed during the weight gain phase often become more visible once the fat underneath shrinks and the skin sits looser against the body.
Muscle growth: Bodybuilders and anyone in a serious strength training block can develop marks across the shoulders, upper arms, chest, and thighs as muscle tissue expands faster than the skin covering it.
Hormonal changes: Elevated cortisol, whether from puberty, pregnancy, stress, or medication, weakens the skin’s elastic fibers and makes stretching more likely to leave a mark.
Can You Get Stretch Marks Without Gaining Weight?
Yes, and this trips a lot of people up. Growth spurts, muscle building, pregnancy-related hormone shifts, and plain genetics can all produce stretch marks while the number on the scale barely moves. If your weight has stayed steady and you are still seeing new marks, look at recent changes in activity level, stress, medication, or simply age-related shifts in skin elasticity rather than assuming you missed something about your diet.
Why Do Some People Get Stretch Marks More Easily Than Others?
Genetics plays a bigger role here than most people realize. If your mother or father developed noticeable stretch marks, you are statistically more likely to as well, since skin’s collagen density and elasticity are largely inherited traits.
Hormone levels, skin thickness, and even the rate at which someone’s body changes during the same event, like two people gaining the same amount of weight, can explain why one person ends up with visible marks and the other does not.
Where Do Stretch Marks Commonly Appear?
Stretch marks tend to show up wherever skin experiences the fastest stretching or the most stored fat: the abdomen, thighs, hips, buttocks, breasts, upper arms, and lower back. Location usually tells you something about the cause. Marks across the belly point to pregnancy or weight change, while marks on the shoulders and upper arms usually trace back to muscle growth or a strength training program.
Why Are Some Stretch Marks Red, Purple, or Dark?
New stretch marks, called striae rubrae, often look red, pink, purple, or reddish brown depending on skin tone, and they can feel slightly raised or itchy at first. That coloring comes from inflammation and visible blood vessels in the freshly damaged dermis.
On deeper skin tones, early marks may look more purple or dark brown rather than pink. As the area heals over months, the color fades and the marks flatten into what dermatologists call striae albae, the lighter, silvery white stage most people recognize.
Why Do Stretch Marks Sometimes Appear Suddenly?
They can seem to appear overnight, but the truth is usually that the underlying stretching happened gradually and the visible mark just crossed a threshold where you finally noticed it. A growth spurt, a pregnancy in its second trimester, a few months of consistent lifting, or starting a new medication can all lead to a cluster of new marks appearing within a short window. If you are seeing several new marks at once, think back over the last three to six months rather than assuming something is wrong.
Can Medications or Health Conditions Cause Stretch Marks?
Long-term use of corticosteroid medications, whether oral, injected, or applied topically, is a well-documented cause because these drugs interfere with collagen and elastin production and thin the skin over time. Cushing’s syndrome, a condition involving excess cortisol, is also associated with widespread and unusually severe stretch marks.
That said, most people with ordinary stretch marks do not have an underlying condition. If your marks are unusually wide, purple, cover large areas of your body, or come with other symptoms like fatigue or rapid weight changes, it is worth mentioning to a healthcare provider so they can rule out anything beyond typical skin stretching.
Are Stretch Marks Normal?
Yes, these are completely normal. They affect the majority of adults at some point, and they show up in healthy people at every fitness level, and men develop them just as women do, most often across the back and shoulders from growth spurts or muscle gain. Ordinary stretch marks are not a sign that something is wrong with your body. They are simply a visible record of how quickly your skin was asked to change.
Can Stretch Marks Be Prevented?
Not entirely, and anyone promising guaranteed prevention is overselling a product. Moisturizing keeps skin comfortable and may reduce itching while it stretches, but clinical research has not shown that oils, creams, or cocoa butter reliably stop marks from forming. Gradual weight changes, when they are realistic for your situation, give the dermis more time to adapt. During stretch marks during pregnancy, most women will develop at least some marks regardless of the products they use, simply because of how fast the body changes and the hormonal shifts involved.
Do Stretch Marks Go Away on Their Own?
They fade, but they rarely disappear completely, since they are a form of permanent scarring similar to any other scar tissue. Early red or purple marks respond better to treatment than mature white ones because there is still active blood flow and collagen remodeling happening in that tissue. Older, silvery marks have settled into a flatter, less pigmented state and tend to be more stubborn.
What Can Make Stretch Marks Less Noticeable?
This is where a lot of people start researching treatment instead of just living with marks they don’t love. Topical retinoids and hyaluronic acid have shown some benefit for early, still reddish marks in clinical studies. For marks that have already matured, in-office treatments tend to make a bigger visible difference.
At Embrace Skin & Wellness, our team builds treatment plans around the age and depth of the marks rather than offering one generic package. Our skin rejuvenation services use collagen-stimulating technology, including radiofrequency microneedling, to encourage the dermis to rebuild the structure that stretch marks disrupted. It is not an overnight fix. Most people need a series of sessions over several months, and we walk through realistic expectations during a complimentary consultation before anyone commits to anything.
What Are the Biggest Myths About Stretch Marks?
A few myths keep circulating that are worth clearing up. “Only pregnant women get stretch marks” is false, since teenagers, weightlifters, and men develop them regularly.
Stretch marks always mean weight gain is also false, since puberty, muscle growth, and genetics all play independent roles.
Moisturizer guarantees prevention is another one that is simply not supported by research, even though a good facial routine can help skin feel more comfortable while it stretches.
What Could Be Behind Your Stretch Marks? A Quick Checklist
If you are trying to figure out your own situation, run through recent changes:
- Growth spurt or noticeable height change
- Pregnancy or postpartum changes
- Weight gain or weight loss over a short period
- New or increased strength training
- Family history of stretch marks
- Recent corticosteroid use, oral or topical
- Any new or unexplained hormonal symptoms, which may be worth discussing during a hormone therapy consultation.
This list is not a diagnostic tool. It is simply a starting point for a conversation, either with your own reflection or with a professional if something feels off.
Why Do Stretch Marks Appear? The Bottom Line
Stretch marks develop when skin stretches or shrinks faster than collagen and elastin can adapt, and the list of triggers is far longer than just gaining weight. Puberty, pregnancy, muscle growth, genetics, hormones, and certain medications all play a role, which is exactly why two people can go through the same life event and end up with very different skin.
They are common. They are almost always harmless. Many fade significantly with time, and for the marks that bother you, professional treatment can genuinely improve how they look, even if it can’t erase them completely. If you are in the Collierville area and want to talk through options for the marks that bother you most, the team at Embrace Skin & Wellness offers a consultation to walk through what is realistic for your skin.
What changed in your body right before your stretch marks showed up? It is usually a bigger clue than most people expect.
Frequently Asked Questions
Can stretch marks itch when they first develop?
Yes, early stretch marks are often itchy or slightly irritated because the skin is actively stretching and healing. A fragrance-free moisturizer can ease the discomfort, though it will not stop the mark from forming. The itching typically settles once the area finishes stretching.
Can stretch marks affect people with darker skin tones differently?
Yes, deeper skin tones tend to show early marks as purple, dark brown, or near-black rather than pink, so the contrast against surrounding skin can look more pronounced at first. A provider experienced with different skin tones can recommend treatments that avoid pigment change.
Can stretch marks become more noticeable after tanning?
Yes, since stretch marks do not tan the way surrounding skin does. When the rest of your skin darkens from sun or self-tanner, the untanned marks stand out more by comparison, even though tanning does not physically worsen them.
Can you have new and old stretch marks at the same time?
Absolutely, and it is very common. Someone who has been pregnant more than once, or who has gone through both puberty and later weight changes, often has a mix of fresh red marks and older, faded white ones on the same body area.
Can stretch marks change texture as they age?
Yes, early marks can feel slightly raised or ropey, while mature marks usually flatten and can feel slightly sunken compared to the surrounding skin. That texture change happens as collagen remodels the scar tissue over months and years.
Can stretch marks appear in places that don't seem to have stretched?
Occasionally, particularly with hormonal causes like corticosteroid use or Cushing’s syndrome, where marks can appear on the arms or trunk without an obvious growth or weight trigger. That pattern is worth mentioning to a healthcare provider.
Can stretch marks return after fading?
The original marks won’t reappear once they’ve faded, but new stretch marks can form in the same area if the skin stretches rapidly again, such as during a second pregnancy or another period of quick weight change.
Are stretch marks different from cellulite?
Yes, completely different conditions. Stretch marks are linear scars from torn collagen and elastin, while cellulite is a dimpled texture caused by fat pushing against connective tissue bands. They can appear in the same areas but have separate causes.
Can stretch marks affect the appearance of tattoos?
Yes, tattooing over existing stretch marks can cause the ink to sit unevenly since the scarred skin absorbs ink differently than smooth skin. Many tattoo artists recommend waiting until marks have fully matured before working over them.
Can stretch marks become less noticeable without treatment?
Yes, most stretch marks fade naturally from red or purple to a lighter silvery tone over one to two years as the body’s healing process continues. They rarely disappear completely, but the contrast against surrounding skin usually softens over time.
Is it possible to have stretch marks without any symptoms?
Yes, many people never notice itching, tenderness, or discomfort at all and only spot the marks visually once they’ve already formed. Symptom-free stretch marks are just as common as ones that itch during formation.
Should unusual stretch marks be photographed or monitored over time?
Yes, if marks are unusually wide, spreading quickly, or appearing without an obvious cause, tracking photos over a few weeks can help a healthcare provider assess changes and decide whether further evaluation makes sense.
Can a professional tell whether stretch marks are new or old?
Yes, providers can usually tell fairly reliably by color and texture. Red, purple, or raised marks are considered early stage, while flat, silvery-white marks are mature. That distinction helps determine which treatments will work best.
What information should you provide during a consultation about stretch marks?
Mention when the marks first appeared, any recent weight, growth, or muscle changes, medication use, family history, and which areas bother you most. That context helps a provider recommend treatments suited to the age and depth of your marks.
Is every new stretch mark a reason to seek medical care?
No, most new stretch marks are a normal response to growth, pregnancy, or weight change and do not require medical attention. Marks that appear suddenly without explanation, spread rapidly, or come with other symptoms are the ones worth discussing with a provider at (901) 457-7891.